Paging Fred Hiatt:

One other president bears comparison to Bush: James K. Polk. Some historians admire him, in part because he made their job easier by keeping a detailed diary during his administration, which spanned the years of the Mexican-American War. But Polk should be remembered primarily for launching that unprovoked attack on Mexico and seizing one-third of its territory for the United States.

Historians are loath to predict the future. It is impossible to say with certainty how Bush will be ranked in, say, 2050. But somehow, in his first six years in office he has managed to combine the lapses of leadership, misguided policies and abuse of power of his failed predecessors. I think there is no alternative but to rank him as the worst president in U.S. history....read on

Arthur shares more American history with us about Mr. Polk.